The iHacklab Marcher

How to build a Marching Lights on an Arduino:

by J.B. Wylzan

Project 6:  Marching Lights:

This project controls two leds in this sequence: 4&6, 5&7, 6&8, 7&9 ... and so on ... in forward and reverse modes. Rewrite the sketch to simulate a pingpong ball motion. 

Hardware:
9 LEDs
9 resistors,  200ohms
connecting wires
breadboard
Arduino R3 UNO

Schematic Diagram:

Block Diagram:

Code # 6:  

/*
 iHackLab Jumping Lights
  powered by Arduino
  sketched by J.B. Wylzan
  modified by Lawsinium

  Lights jump from one led to another led continuously.
  Variables are introduced on this project.
  This example code is public domain.
 */

 // Initialize variable x
 int x = 1000;                                 //shortcut  to change the value of x in delay(x)

 // Setup pins 4 to 12
void setup() 
 {
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(12, OUTPUT);
 }

// makes light jumps from one led to another led continously.
void loop() 
{
  digitalWrite(4, HIGH);   // turn the LED on 
  delay(x);
  digitalWrite(4, LOW);    // turn the LED off 
  
  digitalWrite(12, HIGH);   // turn the LED on
  delay(x);
  digitalWrite(12, LOW);    // turn the LED off

  digitalWrite(6, HIGH);   // turn the LED on
  delay(x);
  digitalWrite(6, LOW);    // turn the LED off
  
  digitalWrite(10, HIGH);   // turn the LED on
  delay(x);
  digitalWrite(10, LOW);    // turn the LED off
  
  digitalWrite(5, HIGH);   // turn the LED on
   delay(x);
  digitalWrite(5, LOW);    // turn the LED off
  
  digitalWrite(11, HIGH);   // turn the LED on 
  delay(x);
  digitalWrite(11, LOW);    // turn the LED off 
  
  digitalWrite(7, HIGH);   // turn the LED on
   delay(x); 
  digitalWrite(7, LOW);    // turn the LED off 
  
  digitalWrite(9, HIGH);   // turn the LED on
  delay(x);
  digitalWrite(9, LOW);    // turn the LED off
  
  digitalWrite(8, HIGH);   // turn the LED on 
  delay(x);
  digitalWrite(8, LOW);    // turn the LED off    
}

Actual Layout :  

Procedure:
1. Build the model as shown above
2. Run the Arduino Interface
3. Select File > New
4. Copy Code #6 above
5. Paste Code #6
6. Click File > Save
7. Click Verify
8. Click Upload
9. Lights jump from one led to another led continuously.

Disclaimer:  We shall not be liable for any loss or damage of whatever nature - direct, indirect, consequential, or otherwise - which may arise as a result of your use of any information on this website. However, if you are interested in using any of the projects for personal or educational purposes, please inform the author by email. 

Public Domain Notice: Copyright (c) 2000. All rights reserved. This article is part of a book entitled iHackRobot. Copies are welcome to be shared or distributed publicly as long proper citations are observed. Please cite as follows: Biotronics: The Silver Species, Joey Lawsin, 1988, USA.

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Patent Pending. 2000 © ®

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